3¼" Bronze Floating Datum Cap for 9/16" Rod
Where a rod monument is to be used for precise vertical measurements, the top section is encased in a grease-filled plastic sleeve, thus isolating the rod from any movements of the surrounding soil. The sand backfill also helps in this process.
A stainless steel datum point is usually used instead of a domed cap and an access cover would usually be fitted to protect the mark. This floating datum cap will give you the identification you need without disturbing the accuracy of the monument.
BMAC6 - Access Cover for 5" & 6" PVC
MSSDP1 - 9/16" Stainless Steel Datum Point
TSS3-Y - 3' Top Security Sleeve w/ endcaps
TSSGREASE - NO-TOX Grease for TSS3-Y
MSS91604 - 9/16" x 4' Stainless Steel Rod w/ Thread
MSS12 - 9/16" Stainless Steel Drive Point